2 Copyright (C) 2001-2006, William Joseph.
5 This file is part of GtkRadiant.
7 GtkRadiant is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 GtkRadiant is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GtkRadiant; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
25 // generic string printing with call lists
26 class GLFontCallList : public GLFont
33 GLFontCallList( GLuint displayList, int asc, int desc, int pixelHeight ) : m_displayList( displayList ), m_pixelHeight( pixelHeight ), m_pixelAscent( asc ), m_pixelDescent( desc ){
35 virtual ~GLFontCallList(){
36 glDeleteLists( m_displayList, 256 );
38 void printString( const char *s ){
39 GlobalOpenGL().m_glListBase( m_displayList );
40 GlobalOpenGL().m_glCallLists( GLsizei( strlen( s ) ), GL_UNSIGNED_BYTE, reinterpret_cast<const GLubyte*>( s ) );
42 virtual int getPixelAscent() const {
45 virtual int getPixelDescent() const {
46 return m_pixelDescent;
48 virtual int getPixelHeight() const {
56 #include "debugging/debugging.h"
58 // LordHavoc: this is code for direct Xlib bitmap character fetching, as an
59 // alternative to requiring gtkglarea, it was created due to a lack of this
60 // package on SuSE 9.x but this package is now commonly shipping in Linux
61 // distributions so this code may be unnecessary, feel free however to enable
62 // it when building packages for distros that do not ship with that package,
63 // or if you just prefer less dependencies...
70 GLFont *glfont_create( const char* font_string ){
71 GLuint font_list_base;
72 XFontStruct *fontInfo;
73 Display *dpy = GDK_DISPLAY();
74 unsigned int i, first, last, firstrow, lastrow;
78 fontInfo = XLoadQueryFont( dpy, "-*-fixed-*-*-*-*-8-*-*-*-*-*-*-*" );
79 if ( fontInfo == NULL ) {
80 // try to load other fonts
81 fontInfo = XLoadQueryFont( dpy, "-*-fixed-*-*-*-*-*-*-*-*-*-*-*-*" );
84 if ( fontInfo == NULL ) {
85 fontInfo = XLoadQueryFont( dpy, "-*-*-*-*-*-*-*-*-*-*-*-*-*-*" );
88 if ( fontInfo == NULL ) {
89 ERROR_MESSAGE( "couldn't create font" );
93 first = (int)fontInfo->min_char_or_byte2;
94 last = (int)fontInfo->max_char_or_byte2;
95 firstrow = (int)fontInfo->min_byte1;
96 lastrow = (int)fontInfo->max_byte1;
98 * How many chars in the charset
100 maxchars = 256 * lastrow + last;
101 font_list_base = glGenLists( maxchars + 1 );
102 if ( font_list_base == 0 ) {
103 ERROR_MESSAGE( "couldn't create font" );
107 * Get offset to first char in the charset
109 firstbitmap = 256 * firstrow + first;
111 * for each row of chars, call glXUseXFont to build the bitmaps.
114 for ( i = firstrow; i <= lastrow; i++ )
116 glXUseXFont( fontInfo->fid, firstbitmap, last - first + 1, font_list_base + firstbitmap );
120 /* *height = fontInfo->ascent + fontInfo->descent;
121 *width = fontInfo->max_bounds.width; */
122 return new GLFontCallList( font_list_base, fontInfo->ascent, fontInfo->descent, fontInfo->ascent + fontInfo->descent );
127 #include <gtk/gtkglwidget.h>
129 GLFont *glfont_create( const char* font_string ){
130 GLuint font_list_base = glGenLists( 256 );
131 gint font_height = 0, font_ascent = 0, font_descent = 0;
133 PangoFontDescription* font_desc = pango_font_description_from_string( font_string );
135 PangoFont* font = gdk_gl_font_use_pango_font( font_desc, 0, 256, font_list_base );
138 pango_font_description_free( font_desc );
139 font_desc = pango_font_description_from_string( "fixed 8" );
140 font = gdk_gl_font_use_pango_font( font_desc, 0, 256, font_list_base );
144 pango_font_description_free( font_desc );
145 font_desc = pango_font_description_from_string( "courier new 8" );
146 font = gdk_gl_font_use_pango_font( font_desc, 0, 256, font_list_base );
150 PangoFontMetrics* font_metrics = pango_font_get_metrics( font, 0 );
152 font_ascent = pango_font_metrics_get_ascent( font_metrics );
153 font_descent = pango_font_metrics_get_descent( font_metrics );
154 font_height = font_ascent + font_descent;
156 font_ascent = PANGO_PIXELS( font_ascent );
157 font_descent = PANGO_PIXELS( font_descent );
158 font_height = PANGO_PIXELS( font_height );
160 pango_font_metrics_unref( font_metrics );
163 pango_font_description_free( font_desc );
165 // fix for pango/gtkglext metrix bug
166 if ( font_height > 256 ) {
170 return new GLFontCallList( font_list_base, font_ascent, font_descent, font_height );
174 // new font code ripped from ZeroRadiant
176 #include <pango/pangoft2.h>
177 #include <pango/pango-utils.h>
179 class GLFontInternal : public GLFont
181 const char *font_string;
185 int y_offset_bitmap_render_pango_units;
186 PangoContext *ft2_context;
187 PangoFontMap *fontmap;
190 GLFontInternal( const char *_font_string ) : font_string( _font_string ){
191 PangoFontDescription *font_desc;
193 PangoRectangle log_rect;
194 int font_ascent_pango_units;
195 int font_descent_pango_units;
197 #if !PANGO_VERSION_CHECK( 1,22,0 )
198 ft2_context = pango_ft2_get_context( 72, 72 );
200 fontmap = pango_ft2_font_map_new();
201 pango_ft2_font_map_set_resolution( PANGO_FT2_FONT_MAP( fontmap ), 72, 72 );
202 ft2_context = pango_font_map_create_context( fontmap );
205 font_desc = pango_font_description_from_string( font_string );
206 //pango_font_description_set_size(font_desc, 10 * PANGO_SCALE);
207 pango_context_set_font_description( ft2_context, font_desc );
208 pango_font_description_free( font_desc );
209 // TODO fallback to fixed 8, courier new 8
211 layout = pango_layout_new( ft2_context );
213 #ifdef FONT_SIZE_WORKAROUND
214 pango_layout_set_width( layout, -1 ); // -1 no wrapping. All text on one line.
215 pango_layout_set_text( layout, "The quick brown fox jumped over the lazy sleeping dog's back then sat on a tack.", -1 ); // -1 null-terminated string.
218 #if !PANGO_VERSION_CHECK( 1,22,0 )
219 PangoLayoutIter *iter;
220 iter = pango_layout_get_iter( layout );
221 font_ascent_pango_units = pango_layout_iter_get_baseline( iter );
222 pango_layout_iter_free( iter );
224 font_ascent_pango_units = pango_layout_get_baseline( layout );
226 pango_layout_get_extents( layout, NULL, &log_rect );
227 g_object_unref( G_OBJECT( layout ) );
228 font_descent_pango_units = log_rect.height - font_ascent_pango_units;
230 font_ascent = PANGO_PIXELS_CEIL( font_ascent_pango_units );
231 font_descent = PANGO_PIXELS_CEIL( font_descent_pango_units );
232 font_height = font_ascent + font_descent;
233 y_offset_bitmap_render_pango_units = ( font_ascent * PANGO_SCALE ) - font_ascent_pango_units;
236 virtual ~GLFontInternal(){
237 g_object_unref( G_OBJECT( ft2_context ) );
238 g_object_unref( G_OBJECT( fontmap ) );
241 // Renders the input text at the current location with the current color.
242 // The X position of the current location is used to place the left edge of the text image,
243 // where the text image bounds are defined as the logical extents of the line of text.
244 // The Y position of the current location is used to place the bottom of the text image.
245 // You should offset the Y position by the amount returned by gtk_glwidget_font_descent()
246 // if you want to place the baseline of the text image at the current Y position.
247 // Note: A problem with this function is that if the lower left corner of the text falls
248 // just a hair outside of the viewport (meaning the current raster position is invalid),
249 // then no text will be rendered. The solution to this is a very hacky one. You can search
250 // Google for "glDrawPixels clipping".
251 virtual void printString( const char *s ){
252 // The idea for this code initially came from the font-pangoft2.c example that comes with GtkGLExt.
255 PangoRectangle log_rect;
257 unsigned char *begin_bitmap_buffer;
259 GLint previous_unpack_alignment;
260 GLboolean previous_blend_enabled;
261 GLint previous_blend_func_src;
262 GLint previous_blend_func_dst;
263 GLfloat previous_red_bias;
264 GLfloat previous_green_bias;
265 GLfloat previous_blue_bias;
266 GLfloat previous_alpha_scale;
268 layout = pango_layout_new( ft2_context );
269 pango_layout_set_width( layout, -1 ); // -1 no wrapping. All text on one line.
270 pango_layout_set_text( layout, s, -1 ); // -1 null-terminated string.
271 pango_layout_get_extents( layout, NULL, &log_rect );
273 if ( log_rect.width > 0 && log_rect.height > 0 ) {
274 bitmap.rows = font_ascent + font_descent;
275 bitmap.width = PANGO_PIXELS_CEIL( log_rect.width );
276 bitmap.pitch = -bitmap.width; // Rendering it "upside down" for OpenGL.
277 begin_bitmap_buffer = (unsigned char *) g_malloc( bitmap.rows * bitmap.width );
278 memset( begin_bitmap_buffer, 0, bitmap.rows * bitmap.width );
279 bitmap.buffer = begin_bitmap_buffer + ( bitmap.rows - 1 ) * bitmap.width; // See pitch above.
280 bitmap.num_grays = 0xff;
281 bitmap.pixel_mode = FT_PIXEL_MODE_GRAY;
282 pango_ft2_render_layout_subpixel( &bitmap, layout, -log_rect.x,
283 y_offset_bitmap_render_pango_units );
284 GlobalOpenGL().m_glGetFloatv( GL_CURRENT_COLOR, color );
286 // Save state. I didn't see any OpenGL push/pop operations for these.
287 // Question: Is saving/restoring this state necessary? Being safe.
288 GlobalOpenGL().m_glGetIntegerv( GL_UNPACK_ALIGNMENT, &previous_unpack_alignment );
289 previous_blend_enabled = GlobalOpenGL().m_glIsEnabled( GL_BLEND );
290 GlobalOpenGL().m_glGetIntegerv( GL_BLEND_SRC, &previous_blend_func_src );
291 GlobalOpenGL().m_glGetIntegerv( GL_BLEND_DST, &previous_blend_func_dst );
292 GlobalOpenGL().m_glGetFloatv( GL_RED_BIAS, &previous_red_bias );
293 GlobalOpenGL().m_glGetFloatv( GL_GREEN_BIAS, &previous_green_bias );
294 GlobalOpenGL().m_glGetFloatv( GL_BLUE_BIAS, &previous_blue_bias );
295 GlobalOpenGL().m_glGetFloatv( GL_ALPHA_SCALE, &previous_alpha_scale );
297 GlobalOpenGL().m_glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
298 GlobalOpenGL().m_glEnable( GL_BLEND );
299 GlobalOpenGL().m_glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
300 GlobalOpenGL().m_glPixelTransferf( GL_RED_BIAS, color[0] );
301 GlobalOpenGL().m_glPixelTransferf( GL_GREEN_BIAS, color[1] );
302 GlobalOpenGL().m_glPixelTransferf( GL_BLUE_BIAS, color[2] );
303 GlobalOpenGL().m_glPixelTransferf( GL_ALPHA_SCALE, color[3] );
305 GlobalOpenGL().m_glDrawPixels( bitmap.width, bitmap.rows,
306 GL_ALPHA, GL_UNSIGNED_BYTE, begin_bitmap_buffer );
307 g_free( begin_bitmap_buffer );
309 // Restore state in reverse order of how we set it.
310 GlobalOpenGL().m_glPixelTransferf( GL_ALPHA_SCALE, previous_alpha_scale );
311 GlobalOpenGL().m_glPixelTransferf( GL_BLUE_BIAS, previous_blue_bias );
312 GlobalOpenGL().m_glPixelTransferf( GL_GREEN_BIAS, previous_green_bias );
313 GlobalOpenGL().m_glPixelTransferf( GL_RED_BIAS, previous_red_bias );
314 GlobalOpenGL().m_glBlendFunc( previous_blend_func_src, previous_blend_func_dst );
315 if ( !previous_blend_enabled ) {
316 GlobalOpenGL().m_glDisable( GL_BLEND );
318 GlobalOpenGL().m_glPixelStorei( GL_UNPACK_ALIGNMENT, previous_unpack_alignment );
321 g_object_unref( G_OBJECT( layout ) );
324 virtual int getPixelAscent() const {
327 virtual int getPixelDescent() const {
330 virtual int getPixelHeight() const {
335 GLFont *glfont_create( const char* font_string ){
336 return new GLFontInternal( font_string );